<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>云上洞庭</title>
  </head>
  <style type="text/css">
  html{
  background-color: lightblue;
  }
  h4{
  margin-left: 10px;
  font-weight: bold;
  }
  #layer,#layout2{
    text-align: center;
    margin: 0 auto;
  }
  .text-center{
    width: 100%;
  }
  </style>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
    <script type="text/javascript" src="src/assets/js/jquery.js"></script>
    <script type="text/javascript" src="src/assets/js/bootstrap.js"></script>
    <script>
      window.onbeforeunload =function(){
        console.log('aaaa');

      }
    </script>
  </body>
</html>
